Hierarchical Bayesian spatial models for predicting multiple forest variables using waveform LiDAR, hyperspectral imagery, and large inventory datasets
In this paper we detail a multivariate spatial regression model that couples LiDAR, hyperspectral and forest inventory data to predict forest outcome variables at a high spatial resolution. The proposed model is used to analyze forest inventory data collected on the US Forest Service Penobscot Experimental Forest (PEF), ME, USA. In addition to helping meet the regression model's assumptions, results from the PEF analysis suggest that the addition of multivariate spatial random effects improves model fit and predictive ability, compared with two commonly applied modeling approaches. This improvement results from explicitly modeling the covariation among forest outcome variables and spatial dependence among observations through the random effects. Direct application of such multivariate models to even moderately large datasets is often computationally infeasible because of cubic order matrix algorithms involved in estimation. We apply a spatial dimension reduction technique to help overcome this computational hurdle without sacrificing richness in modeling.
Citation Information
Publication Year | 2013 |
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Title | Hierarchical Bayesian spatial models for predicting multiple forest variables using waveform LiDAR, hyperspectral imagery, and large inventory datasets |
DOI | 10.1016/j.jag.2012.04.007 |
Authors | Andrew O. Finley, Sudipto Banerjee, Bruce D. Cook, John B. Bradford |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | International Journal of Applied Earth Observation and Geoinformation |
Index ID | 70041615 |
Record Source | USGS Publications Warehouse |
USGS Organization | Southwest Biological Science Center |